Example rules_pyz project

This is a project that uses the rules_pyz Bazel Python rules to run a Python project that depends on some third-party libraries from PyPI. Notably, this is a demo based on a rules_python bug report, showing that third-party namespace packages work correctly: https://github.com/bazelbuild/rules_python/issues/14

Demo usage

Run the command:

bazel run //:use_pypi_libs

You should see it print output. Most importantly, it manages to import the google.cloud.* APIs, which don't work with the native Bazel rules.

Native libraries

This example depends on gRPC, which uses native code wheels. The pip_generate tool generates select statements in third_party/pypi/pypi_rules.bzl which work for Mac and Linux. To try it, run:

bazel build //...
./bazel-bin/grpc_helloworld_server

# in another shell:
./bazel-bin/grpc_helloworld_client

This should print: Greeter client received: Hello, you! which used the grpcio Pip native code wheels.